Belleville-boiler elements with tubes of increasing diameter.



C. RADIGUER.

BELLEVILLE BOILER ELEMENTS W ITH TUBES 0F IhCREASING DIAMETER.

APPLICATION FILED APR-16. I91

' WITIIESS' s Patented Apr. 1-7, 1917.

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0% O I a}? 0 804 C. RADIGUER.

BELLEVILLE BOILER ELEMENTS WITH TUBES 0F INCREASING DIAMETER. M APPLICATION FILED APR. I6. I91 I.

1,223,103, Patent-ed Apr. 17,1917.

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- with the object of diminishing the resistance crimes nnmeuna,

OF ST.-DENIS, TRANCE, ASSIGNOR TO SOCIETE ANONYME DEB ETABLISBEMENTS DELAUNAY-BELLEVILLE, OF ST.-DENI S, FRANCE, 1 CORPORA- BELLEVILLE-BOILER ELEMENTS WITH TUBES OF INCII EASING DIAMETER.

Specification of Letters Patent.

1? atented Apr. n, 1917.

A lication med April is, 1914. Serial no. 332,: we.

,a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The novel arrangement which forms the object of the present invention resides in employing in one and the same element of a Belleville steam generator, tubes whose diameter increases in the u ward direction,

to-circulation atthe upper part of the element and thereby render the circulation in the lower tubes more active.

"- This arrangement 1s applicable to elements comprising two or three coils as well as to elements with a sin le coil.v

. In order to avoi multiplying excessively the different types of tube in one and the same generator, it is preferable not to emmore and 115 mm. p

If'the. element comprises a single coil and six forks, the two lower forks can be mounted in-"82 mm. tubes, the next two forks'in 100mm. tubes and the two upper forks in 115mm. tubes.

The 'unction boxes of the tubes should prefer 1y be imiform in 'diameter,-correspending with the maximum diameter of the tubes employed. Similarly the bore and ta ping. centers for the reception of 'the tu should preferably present the same distance forall diameters of tube.- The boxes, which are superposed flat, thus form a. facade identical with that of an ordinary ploK than three different diameters, sue for example as 70, 80 andlOO or 82,100

. mgr-drawing, in which r forks of each of tie three tube diameters are fitted.

If the element is to comprise eight forks only, three forks of each of the large diameters can be fitted and two forks only of the smallest tube diameter.

If the element is to comprise only seven forks, the seventh is arranged at the top, that is to say with tubes of the maximum diameter, that is t) say there will be two 82 mm. forks, two 1 )0 mm. forks and three 115 mm. forks.

If the elementi :omprises two or three coils, the special lower boxes, front and rear,will be employed in each coil, with the tubes of smallest diametr r, but always preferably with the dimensions that correspond with the boxes of largest diameter; then come the ordinary boxes fi ;ted fiat.

With two cois and three diameters of tube, a twelve fo: '1: element is constituted by arranging in each spiral two 82. mm. forks, two 100 mm. for ks and two 115 mm. forks. If it be desired to fit only ten forksaltogether, one 115 I im. fork at the top'of each spiral is omitted. If only eight forks are required instead of twelve,- one 100 mm.

forlk and one 115 mmL'fork is omitted-in each coi With three cc ils and three diameters of tube an eighteen fork element is formed. in fitting two forks 'of each of the three dime ters. There-will be fifteen forks r element 'if one 115 mm. fork or coil .f' omitted.

There will be t velve orks per element if,

one mm, fork and .one mm. fork be omitted in each coil.

The various fittings in question are illustrated by way 01 example inthe accompanyj igure, 1 is I. front elevation of three boiler. elements constructed in accordance [with the invention; I

Fig; 2 is a sit e elevation of the structure shown in Fig. 1 Fig. 3 is a die the line X-X c Fig. 4 is a front elements in Wh-i( h connectingetpxes ofvaryingr sizes are used for the tu 1g. 5 is a sue elevationof the Structure shownin Fig. 4

1g. 2; e evation of three boiler rammatic sectiontaken on diameters of the tubes.

In the first six figures, the 82, and mm. tubes are respectively designated by the letters a, b, c, with an index which indicates Fig. 6 is a more or less diagrammatic sec tion taken on the line YY of Fig. 5; I

Fig. 7 is a front elevation of three boiler elements constructed in accordance with the invention and each element comprising two coils' Fig. 8is a side elevation of the structure shown in Fig. 7;

Fig. 9 is a more or less diagrammatic section taken on the line ZZ of Fig. 8;

Fig. 10 is a front elevation of two boiler elements constructed in accordance with the invention, each element being composed of three coils;

Fig. 11 is a side elevation of the structure shown in Fig. 10; and

Fig; 12 is a more or less diagrammatic section taken on the line T T of Fig. 11.

Figs 1, 2 and 3 show three elements with one coil composed of eight forks (16 tubes), three of these forks being in 82mm. tubes, three in 100 mm. tubes and two in 115 mm. tubes. These elements are mounted with boxes of tubes 115 mm. in diameter.

Figs. 4, 5 and 6 represent three elements mounted with a single coil com osed of eight forks, three of which are fitte with 82 mm. tubes, three with 100' mm. tubes and two forks with '115 mm. tubes. These elements are fitted with boxes corresponding with the the row of the tube starting fromthe tube of the same diameter arranged lowest.

The front boxes which carry the 82, 100

and 115 mm. tubes are grouped under the letters, A, B, .C. The rear boxes are designated by the same letters with an index showing their row. The rear boxes are provided with two tubes-of the same diameter the same applies to the first two front boxes in each diameter but the fourth box in the natural order carries an 82 mm. tube and a 100 mm. tube and the seventh box carries one 100 mm. tube and one 115 mm. tube.

Comparing Figs. 1 and 4, it will be noted that in Fig. 4 the boxes of the adjacent elements do not contact in the lateral direction. 'Only the 115 mm. tube boxes contact. The

vacant spaces existing between the lower .boxes of the elements notwithstanding the provision of the bafiiesand the screens, form chimne s through which the gases ascend alon t e doors of the tube boxes and, reach the c imney of the generator directly without having served to heat the tubes. It is Figs. 7, 8 and9 represent three two-coil elements each composed of three forks, two forks are fitted with 82 mm. tubes, two with 100 mm. tubes and one fork with 115 mm. tubes.

In these three figures the coils are represented by the letters A and B. In order to designate the front boxes, the letter V is added to the box of the coil with an index which indicates the row of the box in the coil. For the rear boxes, the letter'R- with an index indicating the row is employed.

The tubes are designated by the natural order of the numerals of the first set of ten, in the first coil from 1 to 10; for the second coil the numerals of the second set of ten (11 to 20) are employed.

In each coil in the upward direction the first four tubes are 82 mm. in diameter the following four tubes are 100 mm. in diameter and the two following tubes are 115 mm. in diameter.

With this method of numbering there is no difiiculty in following in Figs. 7 and 9 the path of the current which circulates in each coil. The box AV carries on the left the last 82 mm. tube which comes from the rear and on the right the first 100 mm. tube 100 mm. tube which comes from rear to front and an index indicating the row for the .front boxes and with the letter R and an index for the row-for the rear boxes, the tubes of the first coil are designated by the natural order of the numerals from 1"to 8 for the first-coil and from 11 to'18 for the second coil and from 21 to 28 for the third coil, and

this applies whatever the diameter of the-- .tubes may be.

In'each coil the box AV carries on the left the last 82 mm. tube which comes from the rear and on the right the first 100 mm. tube which proceeds from-the front to the rear." Similarly the'box BV carries on the left the last 100 mm. tube which comes from the rear and the first 115 mm. tube which proceeds from the front to the rear.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a boiler, the combination with an upper collector and a lower collector, of a bol er element comprising a plurality of boiler tubes'through which the water is circulated from the lower collector to the upper collector by the rising steam in the tubes, the tubes in the vicinity of the upper collector being greater in diameter than those in the vicinity of the lower collector and the spaces between the tubes decreasing with the increase of the diameter of the tubes.

2. A boiler element comprisin a coil adapted to permit water to be circu atedupwardly therethrough by rising steam and comprising a plurality of tubes varying in size ,-from relatively small tubes at the bot tom of the coil to relatively large tubes at lector being greater In diameter than those in the vicinity of tie lower collector, and junction boxes to which the ends of the tubes are connected, the boxes being of the same size and arranged in superposed relation. a

I 4. In a boiler, the ombination with an upper collector and a 10 Her collector, of a boiler element comprising a pluralit of boiler tubes through which the water is circulated from the lower coll actor to the up er collector by the rising steam in the tu es, the tubes in the vicinity of the upper collector being greater in die meter'than those in the vicinity of the lower collector, and junction boxes to which the e ids of the tubes are connected, the longitudinal axes of the tubes being equal distan :es apart whereb the spaces between the tubes decrease as t e diameters of the tube; increase.

In testimony whereof I afiix my signature.

GHA RLES RADIGUER. 

